Harper's Dictionary of Classical Literature and Antiquities, "Tribus".
books.google.com
Lomas 2018, p. 353 n. 5. "The popularity of this explanation in the nineteenth and twentieth centuries may owe more to the ethnic and nationalist politics of the time than to a plausible reconstruction of early Rome". Lomas, Kathryn (2018). The rise of Rome: from the Iron age to the Punic wars. Harvard University Press. ISBN978-0-674-65965-0.